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/* brk system call for Linux/i386.

   Copyright (C) 1995, 1996, 2000 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

#include <errno.h>

#include <unistd.h>

#include <sys/syscall.h>

/* This must be initialized data because commons can't have aliases.  */

void *___brk_addr = 0;

int brk (void *addr)

{

    void *newbrk;

    {

        register void *o0 __asm__("%o0") = addr;

        register int g1 __asm__("%g1") = 17 ;

        __asm ("t 0x10" : "=r"(o0) : "r"(g1), "0"(o0) : "cc");

        newbrk = o0;

    }

    ___brk_addr = newbrk;

    if (newbrk < addr)

    {

        __set_errno (ENOMEM);

        return -1;

    }

    return 0;

}